62.56% is the change from 609 to 990
Calculation steps:
[( 990 - 609 ) ÷ 609] x 100 = 62.56%
Formula
Percentage change = [(990 - 609) / 609] x 100
Subtract the new number by the original number
990 - 609 = 381
381 ÷ 609 = 0.625615763546798
0.625615763546798 x 100 = 62.56%